Science Education Resource Center at Carleton College
Serc: Count the Fs: Why a Sample Instead of a Census?
In this interactive lecture activity, students count the number of times the letter F appears in a paragraph. The activity demonstrates that a census may not always give accurate information, and that sample counting can be a more...
Library of Congress
Loc: Abraham Lincoln Primary Source Set
The Library of Congress presents Abraham Lincoln's Primary Source Set. Provides numerous examples of primary documents such as handwritten letters to Mary Todd Lincoln, drafts of speeches, and auditory examples of Lincoln's speech at...